ruby_parser version 3.22.0 has been released! * home: <https://github.com/seattlerb/ruby_parser> * bugs: <https://github.com/seattlerb/ruby_parser/issues> * rdoc: <http://docs.seattlerb.org/ruby_parser> ruby_parser (RP) is a ruby parser written in pure ruby (utilizing racc--which does by default use a C extension). It outputs s-expressions which can be manipulated and converted back to ruby via the ruby2ruby gem. As an example: def conditional1 arg1 return 1 if arg1 == 0 return 0 end becomes: s(:defn, :conditional1, s(:args, :arg1), s(:if, s(:call, s(:lvar, :arg1), :==, s(:lit, 0)), s(:return, s(:lit, 1)), nil), s(:return, s(:lit, 0))) Tested against 801,039 files from the latest of all rubygems (as of 2013-05): * 1.8 parser is at 99.9739% accuracy, 3.651 sigma * 1.9 parser is at 99.9940% accuracy, 4.013 sigma * 2.0 parser is at 99.9939% accuracy, 4.008 sigma * 2.6 parser is at 99.9972% accuracy, 4.191 sigma * 3.0 parser has a 100% parse rate. * Tested against 2,672,412 unique ruby files across 167k gems. * As do all the others now, basically. Changes: ### 3.22.0 / 2025-12-20 * 1 major enhancement: * Announced the EOL of ruby_parser! YAY! * 6 minor enhancements: * 3.3: working down the grammar structural differences. * Added tentative 3.4 support. * Renamed assignable to old_assignable and added newer cleaner assignable * Restructured comparison rake tasks and normalization to deal with lrama changes. * Updated compare versions and added 3.4. * Updated grammars to fit most closely to ruby 3.2. Working it down the line. * 11 bug fixes: * Always raise RubyParser::SyntaxError (wrap and raise). * Bumped ruby version to 3.2+. * Cleaned up user_variable productions to always return sexps. * Corrections and enhancements for gauntlet.md instructions. * Fixed rake compare's clean subtask to nuke the unpacked ruby dirs entirely. * Fixed superclass of V34. * Fixed up a couple errors created by using STRICT_SEXP=2. 3 will be neigh impossible. * I am nothing if not stubborn: fixed errors caused by STRICT_SEXP=3. * Minor fixes for 3.2+ grammars on "defined?" expressions. * Removed a lot of ancient compatibility checks and patches. (eg encodings) * This in turn cleaned up var_ref and a bunch of other productions.